X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FPico.c;h=d206fcb9bf15cb64a87fb7b0dad7556bc6311124;hb=4609d0cdb87fcdd5f419153d7a76e2b06242b294;hp=38c8233ce9a15ec9c79c8d71d18239959d06b48c;hpb=03e4f2a349247334666c87abe3a908df72d23051;p=picodrive.git

diff --git a/Pico/Pico.c b/Pico/Pico.c
index 38c8233..d206fcb 100644
--- a/Pico/Pico.c
+++ b/Pico/Pico.c
@@ -12,17 +12,19 @@
 
 int PicoVer=0x0133;
 struct Pico Pico;
-int PicoOpt=0; // disable everything by default
-int PicoSkipFrame=0; // skip rendering frame?
+int PicoOpt = 0;
+int PicoSkipFrame = 0; // skip rendering frame?
+int emustatus = 0;     // rapid_ym2612, multi_ym_updates
+int PicoPad[2];        // Joypads, format is SACB RLDU
+int PicoAHW = 0;       // active addon hardware: scd_active, 32x_active, svp_active, pico_active
 int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe
 int PicoAutoRgnOrder = 0;
-int emustatus = 0; // rapid_ym2612, multi_ym_updates
-void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware
-
-struct PicoSRAM SRam = {0,};
 int z80startCycle, z80stopCycle; // in 68k cycles
-int PicoPad[2];  // Joypads, format is SACB RLDU
-int PicoMCD = 0; // mega CD status: scd_started
+struct PicoSRAM SRam = {0,};
+
+void (*PicoWriteSound)(int len) = NULL; // called at the best time to send sound buffer (PsndOut) to hardware
+void (*PicoResetHook)(void) = NULL;
+void (*PicoLineHook)(int count) = NULL;
 
 // to be called once on emu init
 int PicoInit(void)
@@ -36,6 +38,7 @@ int PicoInit(void)
   z80_init(); // init even if we aren't going to use it
 
   PicoInitMCD();
+  PicoSVPInit();
 
   SRam.data=0;
 
@@ -45,56 +48,51 @@ int PicoInit(void)
 // to be called once on emu exit
 void PicoExit(void)
 {
-  if (PicoMCD&1)
+  if (PicoAHW & PAHW_MCD)
     PicoExitMCD();
   z80_exit();
 
-  if(SRam.data) free(SRam.data); SRam.data=0;
+  if (SRam.data) free(SRam.data); SRam.data=0;
 }
 
-int PicoReset(int hard)
+void PicoPower(void)
 {
-  unsigned int region=0;
-  int support=0,hw=0,i=0;
-  unsigned char pal=0;
   unsigned char sram_reg=Pico.m.sram_reg; // must be preserved
 
-  if (Pico.romsize<=0) return 1;
+  // clear all memory of the emulated machine
+  memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);
 
-  PicoMemReset();
-  SekReset();
-  // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).
-  SekSetRealTAS(PicoMCD & 1);
-  SekCycleCntT=0;
-  z80_reset();
-
-  // reset VDP state, VRAM and PicoMisc
-  //memset(&Pico.video,0,sizeof(Pico.video));
-  //memset(&Pico.vram,0,sizeof(Pico.vram));
-  memset(Pico.ioports,0,sizeof(Pico.ioports)); // needed for MCD to reset properly
+  memset(&Pico.video,0,sizeof(Pico.video));
   memset(&Pico.m,0,sizeof(Pico.m));
-  Pico.video.pending_ints=0;
-  emustatus = 0;
 
-  if(hard) {
-    // clear all memory of the emulated machine
-    memset(&Pico.ram,0,(unsigned int)&Pico.rom-(unsigned int)&Pico.ram);
-  }
+  Pico.video.pending_ints=0;
+  z80_reset();
 
   // default VDP register values (based on Fusion)
   Pico.video.reg[0] = Pico.video.reg[1] = 0x04;
   Pico.video.reg[0xc] = 0x81;
   Pico.video.reg[0xf] = 0x02;
-  Pico.m.dirtyPal = 1;
 
-  if(PicoRegionOverride)
+  if (PicoAHW & PAHW_MCD)
+    PicoPowerMCD();
+
+  Pico.m.sram_reg=sram_reg;
+  PicoReset();
+}
+
+PICO_INTERNAL void PicoDetectRegion(void)
+{
+  int support=0, hw=0, i;
+  unsigned char pal=0;
+
+  if (PicoRegionOverride)
   {
     support = PicoRegionOverride;
   }
   else
   {
     // Read cartridge region data:
-    region=PicoRead32(0x1f0);
+    int region=PicoRead32(0x1f0);
 
     for (i=0;i<4;i++)
     {
@@ -135,12 +133,41 @@ int PicoReset(int hard)
 
   Pico.m.hardware=(unsigned char)(hw|0x20); // No disk attached
   Pico.m.pal=pal;
-  Pico.video.status = 0x3408 | pal; // always set bits | vblank | pal
+}
+
+int PicoReset(void)
+{
+  unsigned char sram_reg=Pico.m.sram_reg; // must be preserved
+
+  if (Pico.romsize<=0) return 1;
 
-  sound_reset(); // pal must be known here
+  /* must call now, so that banking is reset, and correct vectors get fetched */
+  if (PicoResetHook) PicoResetHook();
 
-  if (PicoMCD & 1) {
-    PicoResetMCD(hard);
+  PicoMemReset();
+  SekReset();
+  // s68k doesn't have the TAS quirk, so we just globally set normal TAS handler in MCD mode (used by Batman games).
+  SekSetRealTAS(PicoAHW & PAHW_MCD);
+  SekCycleCntT=0;
+
+  if (PicoAHW & PAHW_MCD)
+    // needed for MCD to reset properly, probably some bug hides behind this..
+    memset(Pico.ioports,0,sizeof(Pico.ioports));
+  emustatus = 0;
+
+  Pico.m.dirtyPal = 1;
+
+  PicoDetectRegion();
+  Pico.video.status = 0x3408 | Pico.m.pal; // 'always set' bits | vblank | pal
+
+  PsndReset(); // pal must be known here
+
+  // create an empty "dma" to cause 68k exec start at random frame location
+  if (Pico.m.dma_xfers == 0 && !(PicoOpt&POPT_DIS_VDP_FIFO))
+    Pico.m.dma_xfers = rand() & 0x1fff;
+
+  if (PicoAHW & PAHW_MCD) {
+    PicoResetMCD();
     return 0;
   }
 
@@ -157,15 +184,16 @@ int PicoReset(int hard)
 
 // dma2vram settings are just hacks to unglitch Legend of Galahad (needs <= 104 to work)
 // same for Outrunners (92-121, when active is set to 24)
+// 96 is VR hack
 static const int dma_timings[] = {
-83,  167, 166,  83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy
+96,  167, 166,  83, // vblank: 32cell: dma2vram dma2[vs|c]ram vram_fill vram_copy
 102, 205, 204, 102, // vblank: 40cell:
 16,   16,  15,   8, // active: 32cell:
 24,   18,  17,   9  // ...
 };
 
 static const int dma_bsycles[] = {
-(488<<8)/82,  (488<<8)/167, (488<<8)/166, (488<<8)/83,
+(488<<8)/96,  (488<<8)/167, (488<<8)/166, (488<<8)/83,
 (488<<8)/102, (488<<8)/205, (488<<8)/204, (488<<8)/102,
 (488<<8)/16,  (488<<8)/16,  (488<<8)/15,  (488<<8)/8,
 (488<<8)/24,  (488<<8)/18,  (488<<8)/17,  (488<<8)/9
@@ -205,7 +233,7 @@ static __inline void SekRunM68k(int cyc)
   if((cyc_do=SekCycleAim-SekCycleCnt) <= 0) return;
 #if defined(EMU_CORE_DEBUG)
   // this means we do run-compare
-  SekCycleCnt+=CM_compareRun(cyc_do);
+  SekCycleCnt+=CM_compareRun(cyc_do, 0);
 #elif defined(EMU_C68K)
   PicoCpuCM68k.cycles=cyc_do;
   CycloneRun(&PicoCpuCM68k);
@@ -213,7 +241,7 @@ static __inline void SekRunM68k(int cyc)
 #elif defined(EMU_M68K)
   SekCycleCnt+=m68k_execute(cyc_do);
 #elif defined(EMU_F68K)
-  SekCycleCnt+=fm68k_emulate(cyc_do+1);
+  SekCycleCnt+=fm68k_emulate(cyc_do+1, 0);
 #endif
 }
 
@@ -222,7 +250,7 @@ static __inline void SekStep(void)
   // this is required for timing sensitive stuff to work
   int realaim=SekCycleAim; SekCycleAim=SekCycleCnt+1;
 #if defined(EMU_CORE_DEBUG)
-  SekCycleCnt+=CM_compareRun(1);
+  SekCycleCnt+=CM_compareRun(1, 0);
 #elif defined(EMU_C68K)
   PicoCpuCM68k.cycles=1;
   CycloneRun(&PicoCpuCM68k);
@@ -230,19 +258,19 @@ static __inline void SekStep(void)
 #elif defined(EMU_M68K)
   SekCycleCnt+=m68k_execute(1);
 #elif defined(EMU_F68K)
-  SekCycleCnt+=fm68k_emulate(1);
+  SekCycleCnt+=fm68k_emulate(1, 0);
 #endif
   SekCycleAim=realaim;
 }
 
 static int CheckIdle(void)
 {
-  int i, state[0x22];
+  int i, state[0x24];
 
   // See if the state is the same after 2 steps:
-  SekState(state); SekStep(); SekStep(); SekState(state+0x11);
-  for (i = 0x10; i >= 0; i--)
-    if (state[i] != state[i+0x11]) return 0;
+  SekState(state); SekStep(); SekStep(); SekState(state+0x12);
+  for (i = 0x11; i >= 0; i--)
+    if (state[i] != state[i+0x12]) return 0;
 
   return 1;
 }
@@ -251,22 +279,29 @@ static int CheckIdle(void)
 // to be called on 224 or line_sample scanlines only
 static __inline void getSamples(int y)
 {
+#if SIMPLE_WRITE_SOUND
+  if (y != 224) return;
+  PsndRender(0, PsndLen);
+  if (PicoWriteSound) PicoWriteSound(PsndLen);
+  PsndClear();
+#else
   static int curr_pos = 0;
 
   if(y == 224) {
     if(emustatus & 2)
-         curr_pos += sound_render(curr_pos, PsndLen-PsndLen/2);
-    else curr_pos  = sound_render(0, PsndLen);
+         curr_pos += PsndRender(curr_pos, PsndLen-PsndLen/2);
+    else curr_pos  = PsndRender(0, PsndLen);
     if (emustatus&1) emustatus|=2; else emustatus&=~2;
     if (PicoWriteSound) PicoWriteSound(curr_pos);
     // clear sound buffer
-    sound_clear();
+    PsndClear();
   }
   else if(emustatus & 3) {
     emustatus|= 2;
     emustatus&=~1;
-    curr_pos = sound_render(0, PsndLen/2);
+    curr_pos = PsndRender(0, PsndLen/2);
   }
+#endif
 }
 
 
@@ -279,7 +314,7 @@ static void PicoRunZ80Simple(int line_from, int line_to)
   int line_from_r=line_from, line_to_r=line_to, line=0;
   int line_sample = Pico.m.pal ? 68 : 93;
 
-  if (!(PicoOpt&4) || Pico.m.z80Run == 0) line_to_r = 0;
+  if (!(PicoOpt&POPT_EN_Z80) || Pico.m.z80Run == 0) line_to_r = 0;
   else {
     extern const unsigned short vcounts[];
     if (z80startCycle) {
@@ -290,17 +325,17 @@ static void PicoRunZ80Simple(int line_from, int line_to)
     z80startCycle = SekCyclesDone();
   }
 
-  if (PicoOpt&1) {
+  if (PicoOpt&POPT_EN_FM) {
     // we have ym2612 enabled, so we have to run Z80 in lines, so we could update DAC and timers
     for (line = line_from; line < line_to; line++) {
-      sound_timers_and_dac(line);
+      Psnd_timers_and_dac(line);
       if ((line == 224 || line == line_sample) && PsndOut) getSamples(line);
       if (line == 32 && PsndOut) emustatus &= ~1;
       if (line >= line_from_r && line < line_to_r)
-        z80_run(228);
+        z80_run_nr(228);
     }
   } else if (line_to_r-line_from_r > 0) {
-    z80_run(228*(line_to_r-line_from_r));
+    z80_run_nr(228*(line_to_r-line_from_r));
     // samples will be taken by caller
   }
 }
@@ -330,6 +365,10 @@ static int PicoFrameSimple(void)
     lines_step = 14;
   }
 
+  // a hack for VR, to get it running in fast mode
+  if (PicoAHW & PAHW_SVP)
+    Pico.ram[0xd864^1] = 0x1a;
+
   // we don't emulate DMA timing in this mode
   if (Pico.m.dma_xfers) {
     Pico.m.dma_xfers=0;
@@ -360,6 +399,7 @@ static int PicoFrameSimple(void)
     SekRunM68k(cycles_68k_block);
 
     PicoRunZ80Simple(line, lines);
+    if (PicoLineHook) PicoLineHook(lines_step);
     line=lines;
   }
 
@@ -373,12 +413,22 @@ static int PicoFrameSimple(void)
 
     lines += sects*lines_step;
     PicoRunZ80Simple(line, lines);
+    if (PicoLineHook) PicoLineHook(sects*lines_step);
+  }
+
+  // another hack for VR (it needs hints to work)
+  if (PicoAHW & PAHW_SVP) {
+    Pico.ram[0xd864^1] = 1;
+    pv->pending_ints|=0x10;
+    if (pv->reg[0]&0x10) SekInterrupt(4);
+    SekRunM68k(160);
   }
 
   // render screen
   if (!PicoSkipFrame)
   {
-    if (!(PicoOpt&0x10))
+    if (!(PicoOpt&POPT_ALT_RENDERER))
+    {
       // Draw the screen
 #if CAN_HANDLE_240_LINES
       if (pv->reg[1]&8) {
@@ -389,6 +439,7 @@ static int PicoFrameSimple(void)
 #else
       for (y=0;y<224;y++) PicoLine(y);
 #endif
+    }
     else PicoFrameFull();
 #ifdef DRAW_FINISH_FUNC
     DRAW_FINISH_FUNC();
@@ -396,11 +447,11 @@ static int PicoFrameSimple(void)
   }
 
   // here we render sound if ym2612 is disabled
-  if (!(PicoOpt&1) && PsndOut) {
-    int len = sound_render(0, PsndLen);
+  if (!(PicoOpt&POPT_EN_FM) && PsndOut) {
+    int len = PsndRender(0, PsndLen);
     if (PicoWriteSound) PicoWriteSound(len);
     // clear sound buffer
-    sound_clear();
+    PsndClear();
   }
 
   // a gap between flags set and vint
@@ -427,15 +478,17 @@ static int PicoFrameSimple(void)
   }
 
   if (pv->reg[1]&0x20) SekInterrupt(6); // Set IRQ
-  if (Pico.m.z80Run && (PicoOpt&4))
+  if (Pico.m.z80Run && (PicoOpt&POPT_EN_Z80))
     z80_int();
 
-  while (sects) {
+  while (sects)
+  {
     lines += lines_step;
 
     SekRunM68k(cycles_68k_vblock);
 
     PicoRunZ80Simple(line, lines);
+    if (PicoLineHook) PicoLineHook(lines_step);
     line=lines;
 
     sects--;
@@ -446,6 +499,7 @@ static int PicoFrameSimple(void)
   if (sects) {
     lines += sects*lines_step;
     PicoRunZ80Simple(line, lines);
+    if (PicoLineHook) PicoLineHook(sects*lines_step);
   }
 
   return 0;
@@ -457,23 +511,23 @@ int PicoFrame(void)
 
   Pico.m.frame_count++;
 
-  if (PicoMCD & 1) {
+  if (PicoAHW & PAHW_MCD) {
     PicoFrameMCD();
     return 0;
   }
 
   // be accurate if we are asked for this
-  if(PicoOpt&0x40) acc=1;
+  if (PicoOpt&POPT_ACC_TIMING) acc=1;
   // don't be accurate in alternative render mode, as hint effects will not be rendered anyway
-  else if(PicoOpt&0x10) acc = 0;
+  else if (PicoOpt&POPT_ALT_RENDERER) acc = 0;
   else acc=Pico.video.reg[0]&0x10; // be accurate if hints are used
 
   //if(Pico.video.reg[12]&0x2) Pico.video.status ^= 0x10; // change odd bit in interlace mode
 
-  if(!(PicoOpt&0x10))
+  if (!(PicoOpt&POPT_ALT_RENDERER))
     PicoFrameStart();
 
-  if(acc)
+  if (acc)
        PicoFrameHints();
   else PicoFrameSimple();
 
@@ -487,6 +541,17 @@ void PicoFrameDrawOnly(void)
   for (y=0;y<224;y++) PicoLine(y);
 }
 
+void PicoGetInternal(pint_t which, pint_ret_t *r)
+{
+  switch (which)
+  {
+    case PI_ROM:         r->vptr = Pico.rom; break;
+    case PI_ISPAL:       r->vint = Pico.m.pal; break;
+    case PI_IS40_CELL:   r->vint = Pico.video.reg[12]&1; break;
+    case PI_IS240_LINES: r->vint = Pico.m.pal && (Pico.video.reg[1]&8); break;
+  }
+}
+
 // callback to output message from emu
 void (*PicoMessage)(const char *msg)=NULL;
 
@@ -573,14 +638,6 @@ char *debugString(void)
   }
 #endif
 
-#if 0
-  {
-    FILE *f = fopen("zram", "wb");
-    fwrite(Pico.zram, 1, 0x2000, f);
-    fclose(f);
-  }
-#endif
-
   return dstr;
 }
 #endif